Screw driver



e. w. FA'UST. SCREW DRIVER.

T 0N FILED DE I1 1 APPL c 920.

1-,41 1 ,242. Patented Mar. 28, 1922.

GUY W. FAUST, OF AUBURN, PENNSYLVANIA.

SCREW DRIVER;

Specification of Letters Patent. Pate t d 11 28 1922 Application filedDecember 11, 1920. Serial No. 429,933.

T 0 all whom it may concern:

.Be it known that I, GUY W. :FAUST, a citizen of the United States,residing at Auburn, in the county of Schuylkill and State ofPennsylvania, have invented new and useful Improvements in ScrewDrivers, of which the following is a specification.

My present invention has reference to improvements in screwdrivers.

My object is to produce ascrew drlver which is especially designed foruse upon screws that have the kerfs in the heads thereof of a specialformation, and in which the walls provided thereby are so engaged by thebit of the screw driver as to permit of the driving of the screw by atorslonal force applied to the screw driver ZWIthOHt necessitating theapplication of direct or longitudinal pressure thereagalnst, and furtherwherein the screw will not be accident ally dislodged by disengagementof the screw driver.

The foregoing, and other objects which will appearas the nature of theinvention is better understood, may be accomplished by a construction,combination and operative arrangement of parts, such 'as is disclosed bythe drawings which accompany and which form part of this application.

In the drawings 1 Figure 1 is an elevation of a screw driver,constructed in accordance with this invention, and arranged to haveitsbit engaged in the kerf of a screw for which the screw driver isespecially designed.

Figure 2 is a slmilar view, but showing the bit of the driver receivedin the kerf of the screw and turned to engage with the walls formed by.the kerf.

Figure 3 is a sectional view on the line 3-3 of Figure 2.

' Figure 4 is a perspective view of the screw driver showing theadjustable handle on the rectangular shank thereof.

While my improved screw driver may be employed for operation upon screwshaving their heads formed with the usual transverse kerfs, whose sidewalls are straight, the improvement is especially designed for use inconnection witha screw 1, such as is disclosed by the drawing. The screw1 has its head provided with a transverse kerf 2, whose side walls areparallel and straight. The head 3 of the screw 1, below the kerf 2 has asubstantially rectangular transversely arranged slot 4 with which thekerf 2 centrally communicates. v

My improved screw driver includes a handle 5 provided with a metal shank2 that terminates in a bit 7. The shank 6 is square or rectangular incross section. and the b1t is of a width slightly less than that of theshank, the edges of the said bit he 111g arranged at the end thereof tothe shank, while the opposed faces of the bit are beveled at a moredetermlned angle from the shank to the end of the stud bit. Thisarrangement permits of the arrangement on the rectan ular shank of thesocket end'8 of the handle member 9. The handle is arranged at an anglewith respect to the socket, and may be used n connection with theordinary handle 5 inturn ng the screw driver. As the handle 9 is adustable on the shank 6, the employment thereof will be found greatlydesirable when the screw 1 is to be inserted in particularly hard wood,and also when the screw is of the machine type and is employed 1nconnecting metallic plates.

The b1t 7 has its sides, ad acent its enterlng point notched, as at 10.The walls between the notches are spaced a distance from each otherslightly greater than the distance between the inner wall of thetransverse groove or channel 4 and the outer face of the head 3 of thescrew 1. The por tion 1 1 between the notches 10 may be of a materialwidth so as not to weaken the device at this point. The depth of thenotches 10 is suliicient to )ermit of the diagonally opposed corners ofthe T-head provided at the bit end of the driver, contacting with theinner or side walls provided by the groove 4, and the same diagonalcorners of the connecting element or shank 11 contacting with theopposed walls )rovided by the kert' 2. \Vhen the screw driver is soarranged in the head of the screw, the latter cannot be accidentallyremoved from the former. Also in such position a direct longitudinalforce against the screw driver is not necessitated, it being merelnecessary to turn the screw driver with t e screw and thus merely atorsional force is applied to the screw driver. The angularly arrangedadjustable handle 9 will materially assist the operator in eitherdriving the screw home or removing the same, and it is believed that afurther description of the ima slight inclination from end portion ofthe shank; of a supplemental,

one-piece handle. applicable and removable over the forward end of theshank and having an angular aperture adjacent to one end directly andsnugly receiving the major portion of the shank, said supplementalhandle extending at right angles to the -major portion of the shankwhereby the gravitational action of its opposite end wlll tend to holdit to the shank and against length thereof. In testimony whereof I afiixmy signature.

GUY W. FAUST.

casual movement in the direction of the

